Assume Gillette Corporation will pay an annual dividend of

$ 0.68$0.68

one year from now. Analysts expect this dividend to grow at

12.2 %12.2%

per year thereafter until the

44th

year. Thereafter, growth will level off at

1.9 %1.9%

per year. According to the dividend-discount model, what is the value of a share of Gillette stock if the firm's equity cost of capital is

8.3 %8.3%?

I know the formulas to use Present Value for years 1-4 and then the present value of the 4th year. The example I'm walking through and my work on it are not adding up.